US2285643A - Arc chute for electric circuit breakers - Google Patents

Arc chute for electric circuit breakers Download PDF

Info

Publication number
US2285643A
US2285643A US376412A US37641241A US2285643A US 2285643 A US2285643 A US 2285643A US 376412 A US376412 A US 376412A US 37641241 A US37641241 A US 37641241A US 2285643 A US2285643 A US 2285643A
Authority
US
United States
Prior art keywords
arc
slot
extinction
chute
narrow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US376412A
Other languages
English (en)
Inventor
Beiersdorf Hans
Haese Kurt
Muller Otto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric and Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DES115798D external-priority patent/DE728612C/de
Application filed by Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co
Application granted granted Critical
Publication of US2285643A publication Critical patent/US2285643A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns

Definitions

  • blow-out conditions are the more favorable, with the cooling more intenseupon the difiiculties with which the arc is introduced into the chute slot.
  • the gases leave the arc chute with a relatively small speed.
  • Ariseinpressure results. Inthecaseoitoohigh' a resulting pressure within the narrow slot, the pressure also increases in the widened entrance portion of the slot to such an extent that the arc column is prevented by the pressure from entering the narrow slot in the absence oi very strong magnetic blow-out fields.
  • the depth of the slot may be less.
  • a reduction of the pressure or the gases in the arc chute is necessary. This may be brought about by widening the chute slot to the detriment oi the intensity of the extinction power of the slot, or by the provision of a wider entrance portion with less tapering thereof.
  • pressure relief channels end in the widened entrance portion, particularly for relieving the counter-pressure
  • These channels may either be made in the form 0! hollow recesses within the ceramic material or the arc chute, or they may consist of tubes with the walls thereof consisting wholly or partly 0! metal.
  • the use of metal has the advantage that the relic! channels may have relatively large cross-sections, from which an escape of the arc is, nevertheless, prevented.
  • metal fittings ior instance U-shaped magnetized metal clips are arranged on the chute to increase the magnetic rising of the are when entering the blow-out slot, the limbs of the clips being secured in the chute walls in such a manner that they are as close as possible to the slot but are at the same time protected by the chute walls against the influence oi the arc.
  • Fig. 1 shows an arc chute oi the narrow slot type with various pressure relief channels according to the invention terminating in the widened entrance portion, with one wall of the arc chute removed.
  • Figs. 2 to 4A show various toms of safety means for providing against the escape of the arc irom the pressure reliet channels.
  • 1'18. 2 is a sectional view of a portion or the chute taken on the line 11-11 oi Fig. 1;
  • Fig. 3 is a sectional view of a portion of the chute taken on the line III-III oi .Fig. 1;
  • Pig. 4 is a sectional view oi a portion of the chute taken on the line IV-"-IV 0! Fig. l;
  • Fig. 4A is a sectional view taken on the line IVA-IVA of Fig. 1.
  • Fig. 5 is a sectional view of a portion of the Fig. 9 is a sectional view of the arc chute taken along the line 1XIX 0! Fig. 8.
  • Fig. 10 on the left, is a sectional view of the chute in Fig. 8 taken on the line x-x and on the right a sectional view taken on the line XAXA of Fig- 8.
  • Figs. 11 to 13 are sectional views ofQa modifled type of arc chute, not shown, in which are ous arc damping means.
  • Fig. 15 is a sectional view taken along the line XV-XV of Fig. 14.
  • Fig. 16 is a sectional view taken on the line XVI-XVI of Fig. 14. Y
  • Fig. 17 is a modified arc chute, partly in section, which shows different forms of expansion chambers, with part of thefront chute wall, insulating plate and front iron sheet plate removed.
  • Fig. 18 is a sectional view of the arc chute on the line XVIIL-XVIII of Fig. 17 with the front chute wall, insulating plate and iron plate added.
  • Fig. 19 is a sectional view of an arc chute, not shown, which is designed in a similar manner as the arc chute of Fig. 18.
  • Fig. 20 is a sectional view of the arc chute on the line XX-XX of Fig. 1'1 with the front chute wall, insulating plate and front iron plate added.
  • Fig. 21 is a sectional view of an arc chute, not shown, differing slightly from that shown in Fig. 20.
  • Fig. '22 is a sectional view of the arc chute taken on the line XXII-XXII of Fig. 17 with the front chute wall, insulating plate and front iron plate added, and
  • Fig. 23 is a sectional view of an arc chute, not shown, which differs slightly from that shown in Fig. 22.
  • i and 2 denote the two contacts, one of which is stationary and the other may be rotatable about a pivot (not shown), for instance, by a rod.
  • the contacts are shown in the closed circuit position and they are disposed between the chute walls 4 and 5.
  • the chute walls consist as will be seen, for instance, from Figs. 2 to 7 each of a layer of ceramic material, fibre or other refractory insulating material. However, other materials (amino-compounds) may be employed for the chute walls, which materials develop gases under the action of the arc.
  • the chute walls 4 and are formed to provide an enlarged space adja-' cent the contacts I and 2, that is in the zone in which the arc is struck.
  • the chute walls 4 and 5 together form -a widened entrance portion 3 which narrows down to the narrow extinction slot 6 between the walls 4 and 5, which narrow extinction slot may have a width of about 1 to 1.5 mm. which is practically constant throughout the entire blow-out zone.
  • arc horns I and 8 project into the arc chute.
  • the upper horn I consists of a straight fiat bar made, for instance, of copper whose upper end is bent at right angles and which is embedded in the insulating support plate H or in the rear wall of the chute.
  • the opposite arc horn l consists of two limbs, the upper end of the upper limb along which the arc travels is embedded in the insulating chamber.
  • the movable contact is so designed and arranged that it directly slides along the lower part of the horn 8.
  • Figs. 1, 8, 14 and 17 show by arrows 9 and It the direction of the current.
  • aasaess Figs. 1 and 8, i! denotes the vertical portion of the chute with an intermediate layer therein to close the slot I and It the horizontal portion of the chute without an intermediate layer so that the slot I can communicate with the atmosphere.
  • the thickness of the intermediate layer may be equaltotheslotwidthaswillhereinafterbedescribed.
  • pressure relief channels I4, I, II and II respectively extend according to the invention from the widened entrance portion 3 to the outside atmosphere, so
  • the pressure relief channels H may be obtained by providing recesses in the walls 4 and 5 of the narrow slot 6.
  • the pressure relief channels may be de-
  • safety tubes 20 may be provided according to the invention in the pressure relief channel It.
  • Such safety tubes ll serve to reduce the high traveling speed of the are after entering the slot 6 so as to prevent the arc and the heated conducting arc gases from escaping from the arc chute.
  • the safety tubes 20 are preferably made of metal so that part of the arc in the slot 6 is short-circuited.
  • each metallic tube may be surrounded with an insulating jacket.
  • the safety tube may be made of insulating material and its interior wall coated over its whole length or a portion thereof with an electrically conducting metallic layer, the layer being applied thereto by the spraying method or in any other suitable manner.
  • the insulating jacket on the metallic safety tube may project beyond one or both ends of the metallic tube as will be seen from Fig. 4A. In this manner fiashovers between the adjacent metallic safety tubes or between the safety tubes and the current carrying parts of the breaker are prevented. This form of the invention is shown in Fig. 4A.
  • metallic magnetized fittings 22 for instance, U-shaped metallic clips consisting of iron, iron alloys or the like, are arranged on the arc chute to increase the magnetic force for causing the arc to move in the upward direction when entering the blow-out slot 6.
  • the limbs of the iron fittings 22 are embedded in the chute walls 4 and 5 in such a manner as to be as close as possible to the arc slot 8 and are protected at the same time against the influence of the arc by the chute walls. In this manner the magnetic driving force is considerably increased as compared to the use of blow-out magnet coils which may be dispensed within the arc chute according to the invention.
  • the arc chute besides the iron fittings I! may also be provided with u-shaped m netized clips 32 and 33.
  • the clips 32 and '33 are preferably embedded in the insulating material of the chute in such a manner that they are not under the influence of the are.
  • the clip I2 as will be seen from Fig. I may project out from thechutewallsIandIandbeheldfirmlyin position between the walls of the recesses formed in the chute walls-I, I and the insulating plate inserts 2I of Bakelite, bakelized paper, fibre, laminated insulating material (linax) or the like.
  • the clips II may also be embedded in the recesses formed in the chute walls I, I and they are surrounded exteriorly by iron fittings 22.
  • the iron fittings 22 are preferably provided with a lateral extension 2I which encloses the top of the chute and lies exteriorly'of the iron clip II, and which may contain slots to communicate with the narrow slot I.
  • a lateral extension 2I which encloses the top of the chute and lies exteriorly'of the iron clip II, and which may contain slots to communicate with the narrow slot I.
  • U- -shaped insulating plates II may be used to protect clips II from the arc.
  • the iron clips II may be formed of two identical halves and the two halves may be firmly held together in the recesses formed in the insulating walls I, I of the chute by the iron fitting 22 in a manner similar to that shown in the right hand portion of Fig. 10.
  • the pressure relief channels II may extend from the widened entrance portion I to the closed expansion chambers 25 provided in the'interior of the chute.
  • the closed expansion chambers may be thus obtained by cutting out a part of the outer parts of the chute walls and-by covering the empty spaces thus obtained by means of insulating inserts 2I of Bakelite, fibre, linax or the like. Owing to the arrangement of the expansion chambers 28, the counter-pressure is reduced and at the same time the arc gases are prevented from escaping to the outside atmosphere. Flash-overs are also prevented from occurring between the arc and the live parts of the breaker.
  • the design may be carried out in such a manner that the expansion chambers 2I are in communication with the outside atmosphere through the channels 21.
  • metallic safety tubes may be provided in the inclined channels II, which tubes prevent the are from reaching the expansion chambers 2I.
  • the safety tubes 2I may be arranged in the pressure relief ing bodies as and II may be arranged in the narrow blow-out slot I in such a manner as to cause an additional damming up of the gases ,after the arc has entered the blow-out slot I.
  • Such bodies may be, for instance, in the form of flat pieces II of metal or refractory insulating plates, or rods II of metal or insulating material dimensioned in accordance with the slot width.
  • the rods II are arranged in the depressions provided in the two chute walls I, I or in the depressions provided in one chute wall so that they completely fill up the entire slot width.
  • the additional-damning up of the gases may also be brought about by causing the arc slot I -asshowninl 'lg.liitoextendinazig-zag manner as indicated at II.
  • FIG. 17 Another embodiment of the invention consists in arranging the expansion chamber 2I (see Fig. 17) for the escaping gases in such a manner that it is in communication with the outside atmosphere through additional blow-out gaps or pressure relief channels I2 (see also Figs. 20 and 22).
  • I and I denote the chute walls 22 the outer iron fitting, II the insulating spacers between the chute walls I and I to protect the clip II from the arc consisting of refractory insulating material, for instance, of fibre etc., 2I and II insulating inserts, for instance, of fibre,
  • Figs. 17, II denotes the surface ground portion of the chute wall I which closes the slot I similar to l2 in Fig. 15, H the arcing surface of chute wall I forming one side of the slot I, and 12 a cross-section substantially on line XVII-XVII of Fig. 22 showing the outer surface of chute wall I.
  • an expansion chamber II which is in communication with the widened entrance portion I through the blow-out slot I and with the outside atmosphere through the pressure relief channel I2, may be provided besides the expansion chambers 26 for the relief of the pressure formed in entrance portion I in one and the same are chute.
  • safety tubes II of insulating material with inner metallic coatings may be employed, the safety tubes II being arranged inthe half cylinder-shaped grooves Ii provided in the insulating chute walls I and I.
  • II denotes the insulating bushings extending through the lateral extensions II of the iron fittings 22.
  • Figs. 20 and 21, II denotes pressure relief pansion chambers 2I communicae directly with the outside atmosphere through channels I2, i. e., without the use of bushings II.
  • a damping rod II of metal is provided in a groove formed in one of the chute walls
  • the rod II is grooved to receive a member 61 of refractory insulating material.
  • the member Il secures the rod II from falling out.
  • expansion chamber II To relieve the expansion chamber II further expansion chambers II are provided in the embodiment shown in Fig. 22 which communicate with the outside atmosphere through pressure relief channels I2.
  • the expansion chamber II communicates with the expansion chamber II through pressure relief bores II provided with metallic inserts or whose inner walls are metallized.
  • the arc chute is particularly adapted to be used in air of atmospheric pressure. However, it may also be'employed in air of lower or higher pressure as well as in other gases of diiferent pressures which are used to facilitate are extinction, so that a further increase in the interrupting capacity may be obtained. It is also possible to employ the individual features of our invention in other arc chutes, for instance in arc chutes which do not have a widened entrance portion.
  • a circuit interrupter means for establishing an arc, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said arc, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof, and means adjacent said widened entrance portion for relieving the pressure within said narrow extinction slot to facilitate the entry of the arc therein.
  • means for insulating material means for establishing an arc, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said arc, said narrow extinction slot and said widened ensaid narrow extinction slot to effect the extinction thereof, and means comprising tubes at least trance portion being formed by said means of insulating material, means for causing the arc to pass through said widened entrance portion and into saidnarrow extinction slot to effect the extinguishment thereof, and means comprising one or more vents adjacent the juncture between said widened entrance portion and said narrow extinction slot for relieving the pressure within said narrow extinction slot to facilitate the entry of the arc therein.
  • means for establishing an are, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said arc, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinction thereof, means intermediate the ends of said narrow extinction slot for relieving the pressure within said narrow" extinction slot to facilitate the entry of the arc therein, and'safety means associated with said pressure relieving means to prevent the escape of the are through said pressure relieving means, said safety means consisting at least in part of conducting metal.
  • a circuit interrupter means of insulating material, means for establishing an arc, a relatively narrow extinction slot having a relatively" widened entrance portion adjacent said arc, said narrow extinction slot and said widened entrance portion being formed by said means of insulating material, said insulating material evolving an arc extinguishing fluid upon being contacted by an arc, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinction thereof, and means adjacent the juncture between said widened entrance portion and said narrow extinction slot for relieving the pressure within said narrow extinction slot to facilitate the entry of the arc therein.
  • a circuit interrupter means for establishing an arc, a relatively narrow extinction slot having a relatively widened entrance portion ad- Jacent said arc, means for causing the arc to pass through said widened entranceportion and into partly of metal adjacent said widened entrance portion for relieving the pressure within said narrow extinction slot to facilitate the entry of the arc therein.
  • means for establishing an arc a relatively narrow extinction slot having a relatively widened entrance portion adjacent said arc.
  • a circuit interrupter means for, establishing anarc, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said arc, means for causing the arc to pass through said widened entrance Portion and into said narrow extinction slot to effect the extinguishment thereof, and means comprising one or more tubes at least partly of metal extending within said narrow extinction slot and terminat-,
  • an arc chute comprising two chute walls, said chute walls forming a relatively narrow extinction slot having a relatively widened entranc portion adjacent said arc, means for causing the arc to pass, through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof, means intermediate the ends of said narrow extinction slot forv relieving the pressure within said narrow extinction slot to facilitate the entry of the arc therein, and one or more magnetized substantially U-shaped metallic clips,
  • a circuit interrupter means for establishing an arc, an arc chute, one or more expansion chambers provided in the walls of said arc chute, a relatively narrow extinction slot having a relatively widened entrance portion adiacent said arc, means for causing the arc to pass pansion chambers provided in the walls of said arc chute, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said arc, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to efl'ect the e!- tinguishment thereof, and means for relieving the pressure within said narrow extinction slot comprising one or more vents which lead from "he region adjacent the juncture between said videned entrance portion and said narrow ex- ;inction slot to one or more of said expansion :hambers, at least one of said expansion chamoers venting to the atmosphere outside said chute, and safety means associated with said one or more vents consisting in part of metal for preventing the escape ofthe are through
  • means for establishing an arc, a relativelynarrow extinction .slot having a relatively widened entrance portion adjacent said arc means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof, means for relieving the pressure within said fnarrow extinction slot comprising one or moreivents extending within said narrow extinction slot, one or more passages, and one or more expansion chambers communicating by one or more of said passages with at least one of said vents.
  • means for establishing an are, a relativelyv narrow extinction slot having a relatively widened entrance portion adjacent said arc, a cross-section through said narrow extinction slot showing it to have a curved configuration, and means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof.
  • means for establishing an arc means for establishing an arc, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said arc, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to eflect the extinguishment thereof, means intermediate the ends of said narrow extinction slot for relieving the pressure withinsaid narrow extinction slot to facilitate the entry of the arc therein, and means comprising one or more members disposed within said narrow extinction slot to increase the pressure therein and to prevent rapid motion of the arc therein.
  • means for establishing an are, a r latively narrow extinction slot having a relatively widened entrance portion adjacent said arc, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof, and means comprising one or more elongated insulating members disposed within said narrow extinction slot to increase the pressure therein and to prevent rapid motion of the arc therein.
  • a circuit interrupter means for establishing an are. a relatively narrow extinction slot having a relatively widened entrance portion adjacent said are, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot-to effect the extinguishment thereof, and one or more expansion chambers disposed within said narrow extinction slot to effect a reduction of the pressure therein.
  • a circuit interrupter means for establishing an are, a relatively narrow extinction slot having a relatively widened entrance portion azUacent said are, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof, one or more expansion chambers disposed within said narrow extinction slot, and means adjacent the juncture between said widened entrance portion and said narrow extinction slot for relieving the pressure within said narrow extinction slot to facilitate the entry of the arc therein.
  • a circuit interrupter means for establishing an are, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said are, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effectthe extinguishment thereof, one or more expansion chambers disposed within said narrow extinction slot, one or more second expansion chambers, and means comprising one or more passages leading from adjacent the entrance of said narrow extinction slot to one or more of said second expansion chambers to relieve the pressure within said narrow extinction slot to facilitate the entry of the arc therein.
  • a circuit interrupter means for establishing an arc, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said are, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof, one or more expansion therein.
  • a relatively narrow extinction slot having a relatively widened entrance portion adjacent said are, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof, one or more expansion chambers disposed within said narrow extinction s1ot, one or more elongated members disposed within said narrow extinction slot and extending at least part way across one or more of said expansion chambers, and means intermediate the ends of said narrow extinction slot for relieving the pressure within said narrow extinction slot to facilitate the entry of the arc therein.
  • a circuit interrupter means for establishing an arc, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said arc, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof, one or more expansion chambers disposed within said narrow extinction slot, one or more adjacently disposed expansion chambers communicating with said first-mentioned one or more expansion chambers, and one or more elongated members disposed within said narrow extinction slot and extending at least part way across one or more of said first-mentioned expansion chambers.
  • a circuit interrupter means for establishing an arc, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said arc, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effeet the extinguishment thereof, one or more expansion chambers disposed within said narrow extinction slot, one or more adjacently disposed second expansion chambers communicating with one or more of said first-mentioned expansion chambers, one or more elongated members disposed within said narrow extinction slot and extending at least part'way across one or more of said first-mentioned expansion chambers, and means adjacent the juncture between said widened entrance portion and said narrow extinction slot for relieving the pressure within said narrow extinction slot to facilitate the entry of the arc therein.
  • means for establishing an are, a relatively narrow extinction slot having a relatively widened entrance portion adjacent'said arc, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof, one or more expansion chambers disposed within said narrow extinction slot, one or more adjacently disposed second expansion chambers communicating with one or more of said first-mentioned expansion chambers, one or more elongated members diswithin said narrow extinction slot and extending at least part way across one or more of said first-mentioned expansion chambers, and means comprising one or more venting tubes leading from adjacent the entrance to said narrow extinction slot to relieve the pressure within said narrow extinction slot and to facilitate the entry of the arc therein.
  • a circuit interrupter means for establishing an arc, a relatively narrow extinction slot having a relatively widened entrance portion adjaoent said arc, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to eflect the extinguishment thereof, one or more expansion chamfrom the regionadiacent the juncture between 'said widened entrance portion and said narrow extinction slot to one or more of said third-mentioned adjacently disposed expansion chambers to relieve the pressure within said narrow extinction slot'and thus to facilitate the entry of the arc therein.
  • a circuit interrupter means for establishing an arc, an arc chute, one or more expansion chambers provided in the walls of said are chute, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said arc, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof, and means for relieving the pressure within said narrow extinction slot comprising one or more vents which lead from the region adjacent said widened entrance portion to one or more of said expansion chambers, at least one of said expansion chambers venting to the atmosphere outside said are chute.
  • a circuit interrupter means for establishing an arc, an arc chute, a relatively narrow extinction slot having a relatively widened entrance portion adjacent said arc formed by the walls of said are chute, means for causing the arc to pass through said widened entrance portion and into said narrow extinction slot to effect the extinguishment thereof, and means comprising one or more registering grooves on said chute walls forming said narrow extinction slot to create one or more vents terminating adjacent thejuncture between said widened entrance portion and said narrow extinction slot to relieve the pressure within said narrow extinction slot and thus to facilitate the entry of the arc therein.
  • means for establishing an are, an arc chute, a relatively narrow extinction slot having a relatively widened enextinction slot having a. relatively widened enbers disposed within said narrow extinction slot,

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
US376412A 1934-10-20 1941-01-29 Arc chute for electric circuit breakers Expired - Lifetime US2285643A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DES115798D DE728612C (de) 1934-10-20 1934-10-20 Schalter mit Lichtbogenkammer
DES6125D DE914869C (de) 1934-10-20 1939-08-29 Schalter mit Lichtbogenkammer

Publications (1)

Publication Number Publication Date
US2285643A true US2285643A (en) 1942-06-09

Family

ID=7993665

Family Applications (1)

Application Number Title Priority Date Filing Date
US376412A Expired - Lifetime US2285643A (en) 1934-10-20 1941-01-29 Arc chute for electric circuit breakers

Country Status (3)

Country Link
US (1) US2285643A (nl)
BE (3) BE421025A (nl)
FR (3) FR820456A (nl)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429846A (en) * 1944-03-24 1947-10-28 Gen Electric Electric circuit interrupter
US2606262A (en) * 1949-07-27 1952-08-05 Gen Electric Electric circuit interrupter
US2629036A (en) * 1950-03-16 1953-02-17 Bendix Aviat Corp Circuit breaker
US2639353A (en) * 1950-01-24 1953-05-19 Allis Chalmers Mfg Co Circuit breaker with arc chute short circuiting sections of the arc
US2648744A (en) * 1950-03-30 1953-08-11 Westinghouse Electric Corp Circuit interrupter
US2687461A (en) * 1949-02-23 1954-08-24 Westinghouse Electric Corp Air-type circuit interrupter
US2761933A (en) * 1952-12-22 1956-09-04 Merlin Gerin Device for breaking electric circuits
US2900477A (en) * 1956-09-21 1959-08-18 Westinghouse Electric Corp Circuit interrupters
US3032627A (en) * 1959-03-05 1962-05-01 System Analyzer Corp Electrical switch
US4256937A (en) * 1978-06-16 1981-03-17 Square D Company Electromagnetic contactor arc chute
US20110180515A1 (en) * 2008-07-31 2011-07-28 Doduco Gmbh Extinguishing plate for an arc extinguishing chamber

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428254A (en) * 1944-03-21 1947-09-30 Gen Electric Circuit breaker
DE1933529A1 (de) * 1969-07-02 1971-01-21 Bbc Brown Boveri & Cie Lichtbogenkammer aus Siebkeramik

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429846A (en) * 1944-03-24 1947-10-28 Gen Electric Electric circuit interrupter
US2687461A (en) * 1949-02-23 1954-08-24 Westinghouse Electric Corp Air-type circuit interrupter
US2606262A (en) * 1949-07-27 1952-08-05 Gen Electric Electric circuit interrupter
US2639353A (en) * 1950-01-24 1953-05-19 Allis Chalmers Mfg Co Circuit breaker with arc chute short circuiting sections of the arc
US2629036A (en) * 1950-03-16 1953-02-17 Bendix Aviat Corp Circuit breaker
US2648744A (en) * 1950-03-30 1953-08-11 Westinghouse Electric Corp Circuit interrupter
US2761933A (en) * 1952-12-22 1956-09-04 Merlin Gerin Device for breaking electric circuits
US2900477A (en) * 1956-09-21 1959-08-18 Westinghouse Electric Corp Circuit interrupters
US3032627A (en) * 1959-03-05 1962-05-01 System Analyzer Corp Electrical switch
US4256937A (en) * 1978-06-16 1981-03-17 Square D Company Electromagnetic contactor arc chute
US20110180515A1 (en) * 2008-07-31 2011-07-28 Doduco Gmbh Extinguishing plate for an arc extinguishing chamber

Also Published As

Publication number Publication date
BE421025A (nl) 1937-05-31
BE439208A (nl)
BE430770A (nl)
FR51348E (fr) 1942-04-15
FR820456A (fr) 1937-11-12
FR49896E (fr) 1939-08-22

Similar Documents

Publication Publication Date Title
US2285643A (en) Arc chute for electric circuit breakers
US2160681A (en) Circuit interrupter
US3621169A (en) Electric circuit interrupter with novel arc gas discharge muffle assembly
US2243038A (en) Circuit interrupter
US2100753A (en) Circuit interrupter
US2243040A (en) Circuit interrupter
US2215797A (en) Circuit interrupter
US2037418A (en) Circuit breaker
US3291948A (en) Orifice structure for compressed gas-circuit interrupter
US2734970A (en) Circuit interrupters
US2353729A (en) Air blast arc chute
GB366998A (en) Improvements relating to electrical circuit breakers
US2443017A (en) Electric arc extinguishing apparatus
US2249499A (en) Electric circuit interrupter
US2027219A (en) Circuit breaker
US2294801A (en) Circuit interrupter
US2836683A (en) Arc-extinction casing for circuit-breaker
US3307004A (en) Arc extinguishing structures for circuit interrupters
US1899612A (en) Circuit interrupter
GB541236A (en) Improvements in or relating to a.c. electric circuit-breakers of the gas-blast type
US4011425A (en) Arc chute extension for increased interruption rating
US2039054A (en) Oil circuit breaker contact
US1861128A (en) High-power circuit-breaker
US1932061A (en) Circuit breaker
US2088489A (en) Circuit interrupter